Multiple effect.



A. L. WHERE. MULTIPLE EFFECT.

APPLIOATION FILED $313.2, 1912.

LMQAML Patented Jan. 7, 1913. 2 SEEETSSHBET 1.

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MULTIPLE EFFEGT.

APPLIOATION FILED FEB.2, 1912. &9,2, Patented Jan. 7, 1913.

2 SHEETSSHEET 2.

Witmmw I L. Wbr'rz 25M tic M1113 s,

n, or imw ORLEANS, LOUISIANA,

ASSIGNOR TO JOHN n1 MURPHY,

OF NEW ORLEANS, LOUISIANA.

' MULTIPLE nrrnc'r.

Specification of Letters Patent. Application filed February ,2, 1912. Serial No. 675,094;

Patented Jan. 7, 1913.-

To all whom it may concern:

Be it known that I, ALFRED L. WEBRE, a

' citizen of the United States, residing at New Orleans, in the parish of Orleans and State 5 of Louisiana, have invented certain new and useful Improvements in Multiple Effects;

2 and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art and use the same.

My invention relates to improvements in multiple effects, or other evaporating apparatus, and it consists in the constructions,

combinations and arrangements herein described and claimed.

An object of my invention is to provide an improved effect provided with automatic means for'positively controlling the level of the boiling liquids, thereby permittlng the boiling liquids to besafely maintained at a less head' or level than has been heretofore possible; whereby the relatively rapid movement of such liquids will tend to scour the boiling side of the heating surfaces and prevent fouling of the latter.

A further object of my invention is to provide an improved gravity-actuated means for automatically controlling the level of the boiling liquids in a multiple effect, which is free from all moving parts and durable and certain in action.

In the accompanying drawings forming a part of this application, and in which similar reference symbols indicate corresponding parts in the several a side elevation of a double effect, illustrating one embodiment of my invention; Fig. 2 is an enlarged fragmentary view of the lower portion of Fig. 1, with parts broken away, to show means for automatically controlling the level of the boiling liquids.

' Referring to the drawings, 1 indicates an outlet pipe from the bottom .4 of an effect 8, which is provided with a drain 2 and a manually-operated valve 3, and terminates in an over-flow discharge, or funnel 6 with- In a closed controlling chamber 5; said chamber being connected to the vapor belt of said efiect by a small pipe 9 provided with a valve 10. An eye glass 19 is provided in the wall of the chamber5 in position for conveniently reading a hydrometer- 20, which latter is supported for limited move ment in the funnel 6, said hydrometer floatto which it appertains to make valve 17,

views :Figure l is ing in the boiling liquids flowing slowly through the funnel 6, and indicating at all times the extent of evaporation.

A U-pipe, provided with a drain 14 and a manually-operated valve 15, has its short leg 13 connected at 11 to the controlling chamber 5, and its long leg 21 connected at a higher level 22 to the next, or succeeding, effect 12; said unequal legs 13 and 21 being so proportioned that the U-pipe will provlde a suflicient head of the boiling liquid passing therethrough to overcome the dif-- ference of vacuum in said The effect 12 is provided controlling chamber 24, which incloses an over-flow discharge and is connected at its top and bottom, respectively,with the va por belt of said effect and with an outlet pipe 18. A by-pass 16, provided with a connects the pipes 21 and 18, to 7 provlde a convenient means for cutting out the effect 12 and conducting the boiling liquids from the chamber 5 directly to the discharge pipe 18.

In the operation of this device, the liquid supplied to the effect 8 will be automati-' cally maintained at a level 47 in line with the top of theover-flow discharge 6; said discharge 6 being positioned at the desired efiects 8 and 12.

height. After the level 47 has been reached, 35 v the boiling liquids over-flow from said funnel 6 into the chamber 5 and fill the short leg 13 and a portion of the long leg 21, and are drawn into the next effect 12 by the greater vacuum therein.) lVhen normal running conditions have been established, the level of the liquid assumes such a position in the short leg 13 that the dynamic head of the flowing liquid plus the statibhead due to the height between such level and the top of the long leg 21 just balances the difference of vacuum between the two effects 8 and 12.

If desired, the. automatic device for controlling the liquid level can be readily cut out by closin the valve 10, upon which, the controlling c amber 5 and the entire pipe system will become filled with the boiling liquids; under these conditions, the liquid levels in the effects can be regulated by the Valve 15.

From the above description, it will be clearthat my invention provides eficient means by which the level 47 of the boiling liquids can be maintained with certainty at 110 the vapor belt the lowest permissible point, thereby n0 ticeably increasing the evaporation an causing the relatively rapidly moving liquids to exert a scouring edect which tends to prevent fouling of the heating surface.

l have illustrated and described my inven tion applied to a double, efiect, but it will be obvious that it may be similarly applied to all multiple efiects, such as triple efiects, quadruple efi'ects, etc.

l claim l. in a multiple efiect, the combination of an over-flow discharge for the boiling liquids, a controlling chamber inclosing said over-flow discharge, means for maintaining said chamber at a pressure equal to that of necting said controlling chamber to the succeeding effect at a level above that of the liquid discharge in said chamber.

2. in an efiect, the combination of an over-flow discharge for the boiling liquids,

means for maintaining said over-flow discharge in free communication with the vathe effect, means for closing por belt of and a pipe connecting said communication,

2 said controlling chamber. to the succeeding efiect at a level above said over-flow d1scharge. i

3. In a multiple efiect, the combination of of the efiect, and a pipe con-' an over-flow discharge for the iboilingliguids, a controlling chamber inclosing sal over-flow discharge, means for maintaining said chamber at a pressure equal to that of the vapor belt of the efie'ct, and a tl-pipe having its short leg connected to said controlling chamber and its long leg connecte fiect.

at a higher level with the succeeding e 4. In an efiect, the combination of an over-flow discharge for the boiling liquids, a controlling chamber inclosin said overflow discharge, and a density indicator Within said chamber for indicating the rate of evaporation in the efiect.

5". In a multiple efiect, the combination of over-flow discharges for the boiling liquids f of the several efiects, independent controlling chambers inclosing said over-flow discharges and communicating with the vapor belts of the corresponding efiects, and inverted siphons for con discharge from said several controlling chambers tothe succeeding eidects.

in testimony whereof, I afix my signature, in. presence of two Witnesses.

ALFRED L. WEBER Witnesses:

E. H. Rousseau, German Masson.

ducting the liquid 

